Guard for the mouthpieces of telephone-transmitters.



PATENTED JUNE 12, 1906.

. g G. E. eRr-M'M. GUARD FORI'THE' MOUTHP IEGES OF TELEPHONE 'TRANSMITTERS. V v APPLICATION FILED MAYIB, 1906.

- To all whom it may concern IYNITED PATENT ()FFICE; GERHARDT s. can 1M, or PHILADELPHIA, rnnnsrhvaniad GUARD FQR THE MOUTHP'IECES stsm-ions raansmrrrsss.

Be it known that I, Gear-mung E. GRIMM, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Guards for the Mouthpieces of T'e1ephone-Transmitters,

ofwhich the following is a specification.

My invention relates to new and useful improvcments in guards for the mouthpiece of tclephon'etransmitters, and especlally to guardswhich'are adapted to be detachably engaged with the transmitter and include in .this structure an antiseptically-treated film or diaphragm which when the guard is in operative position is disposed over the entrance to thetra'n smitter to prevent the accumulation of disease germsin the mouthpiece to the transmitter, as well as to destroy such germs, so as to prevent the possible spread of disease. I

The primary object of the inventionis to provide a guard of the character mentioned which is simple in construction, inexpensive of production, and which will effectively attain the purposes for which it is devised.

- A further object is to provide a new and improved means for detachably supporting the guard .in. operative position upon the transmitter.

Theinvention,broadlyandgenerallystated, consists in a guard embodying in its structure an apertured device having improvedand simp i'lied means to engage the transmitter mouthpiece to maii' tain the guard in operative position, the aperture in said guard being closed by a sheet or film of antisepticallytreated material. 1 r

. I have fully and clearly illustrated my in vention in the accompanying drawings, to be taken as a, part of the invention, and whorcinv v Figure 1 is a perspective view of a structure embodying the inventionand'shown at tached in operative position'to 'a telephone transniitteix- Fig- 2 is a transverse central section thereof. Fig. 3 is a view in rear elevation. Fig. 4 1s a'view in rear elevation. of another form of the nvention. Fig. 5 s a central transverse section through the iorin Specifieatmn'o etters latent. E

or-arms 4i 5 being bent or folded on the rear face of said plate with their unat material, preferahly cardboard or similar terial, having the proper degree of rigidity, said plate being constructed to be supported across the mouthpiece 2 of the well-known;

form of telephone-transmitter and Patented June 12, 19(33. I Original application filed August 12, 1905, Serial No. 273L879. hividsd end this anplioation'filed May 18, 1906 Serial No. 317. 51). 1

formed with a central openin 3, which regis-j ters with the openin in tie transmitter mouthpiece when sai position thereon. The plate 1, as shown in prefera 1y rectangular and is provided with plate is in operative,

the drawings, is

suitable means for detachably engaging the mouthpiece 2 of the ,transmitterto support the plate in positionfor use.

formed integral with said plate 1, said win 's rearwardly tached ends free and extending towardeach other, as shown. In placing the. complete guard in position on the mouthpiece 2 of the transmitter, as hereinafter described, the

arms 4 5 are-arranged to engage and grasp" the said mouthpiece and serve to irictionally engage the latter at diametrically opposite,

This engaging or attaching means consists of oppositelya disposed arms or .win'gs 4i .5, which may he points thereon. order to provide for the i more secure and effective engagement of the wings with the transmitter, the vertical free edge of each Wing is formed with a curved re cess 6 in which the mouthpieceis received and which curved portions embrace the cir eula'r mouthpiece 2 and aflord a more satisfactory engagement than were said vertical 1 0 engaging faces left straight. v

Arranged over the i'rcnthface of the plate 11 l r and in a substantially parallel plane thereto is a plate 7, having an openin 8 therethrough J .915

so located as to register wit the openin 3 in the first-named, plate, said plate 7 being preferably of the same size and contour as the plate 1.1 The twocplates l and 7 are permanently secured to each other, so as to pro vide apractically integral strueture, said tial surface contact;

plates being so secured on their vertical side edges as to have their inner faces in substazm- The means for secur-- ing the plates to ether consist of wire staple fasteners}? of we l-known form, one "ofwlnCh s located at each corner of said plates, and closely ad acent the vertical edges thereof,

the pron s of said staples being inserted through t e plates 1 and 7 and the Wings-,4 and 5, so that not only. are the said plates firmly secured together, but the wings. 4 '5 being secured or anchored to the plate 1 ate IIO , e] n substance to the point removed from their edges great rigidity and grasping strength is given to said yvings, so that they form they were free to move on the fold by which they are connected to the plate 1. While l. have shown the plates secured by wire staes as affording a simple and efiicient means for this purpose, it is, however, obvious that other-means might be employed, if desired, without departing from the spirit of my invention. It will be seen that although the rear and front plates 1 and 7 are securely fastened together a space is afforded between them through which a film 13 of antisepticallytreated material may beinserted to take po- .sition between said disks or plates to cover theiopenings 3 and 8 therein in order to interc'ept the passage of the breath of the operator when the transmitter is in use and also to prevent access of dust and other formouthpiece.

. n'Fig. 3 have shown the disk 13 as being formed with a large number of minute perforations, which provide for the easy passage of the sound-waves into the transmitter,

but do not affect or change the antiseptic and germ-destroying properties of the invention. It will be understood that while't-hese perforations will permit the passage of'soundwaves into the transmitter they are so minute that. dust and other fino particles cannot pass therethrou'gh.

, I have shown a slightly-modified form of .the invention in Figs. 4 and 5, in which the front plate 7 is formed with end folds 14, which are turned back upon the wings 4 and v5, said folds being also engaged by the fastening devices 9. This form is advantageous as providing a more finished and sightly article than that shown in Figs. 1, 2, and 3. I

-, In that form 'of the invention shown in Fig. 6 the attaching wings or arms 4 and 5 are formed integral with the plate 7, the inner plate being dispensed with, and the dia 'phragm of antiscptically-treated material is secured upon the rcarside of the said plate 7 by asuitable adhesive. If desired, the side edges of the diaphragm ma'fv project far enough be tween the plate 7 and the arms 4 and5 to he engaged by the fasteners 9 ,but this is not necessary, as the adhesive will elliciently maintain the diaphragm in proper position over the opening 8. However, if the adhesive is not employed the fasteners will hold the diaphragm in position. This last-described form. of the invention is especially dcsirablc where a guard of verysimple construction and small cost of production is required. I-laving thus described "my invention, what Iclaim as new, and desire to secure by Letters Patent, is t 1 l.- In a guard of the character described, a

, rm'ledtoward each other,

3 plate having an opening, a film of antisepticallytreated material located over said openelastic or spring mouthpiece-engaging clips and hold the l guard more effectually in position than if ing and fastening-wings carried by said plate and adapted to engage the mouthpiece of a transmitter, said wings being recessed at their free ends to conform substantially to the contour of and embrace the mouthpiece.

2. In a guard of the character described, a plate having an opening, a film of antiseptically-treated material located over said opening, fastening-wings formed integral with said plate and adapted to engage the mouthpiece of a transmitter, said wings being recessed at their free ends to conform substantially to the contour of and embrace the mouthpiece, and means to connect said wings to the plate at a point adjacent their bases.

3. In a guard of the character described, a plate having an opening, a film of antiseptically-treated material located over said opening, and oppositely-disposed fastening-wings formed integral with said plate and adapted to engage the mouthpiece of a transmitter, said wings being recessed at their engaging portions to conform substantially to the contour of the mouthpiece, and embrace the latter.

4. In a guard of the character described, a

plate having an opening, a film of antiseptically-treated material located over said opening,'two of the sid 101 to each other and each formed with an integral recessed fastening-wing folded onto the rear side of the plate and having their engaging portions directed toward each other, and means to maintain said Wings in folded and resilient condition.

5. In a guard of the character described, a plate having an openirig, a film of antiscptically-treated material located over said opcning on the front of said plate, op msitely-disposed recessed fastening-wings ormed integral with-said plate and folded onto the rear side of said plate and having their engaging portions directed toward each other, a second apcrtured platev arranged over said film and first-named plate, and means for securing said plates together said means also operating to maintain said wings in folded and resilient condition.

(5. In a guard of the character described, a plate having an opening, a iilm of antiseptic- 21ll \--Ll(':1t('d material located over said opening, on the front of said plate, oppositcly-disposed fastening-wings l'ormcd integral-with said plate and folded ontothc rcarsidcof said plate. and having their engaging portions dia second apcrtnred platcarranged over said film and first-named plate, and means whereby the plates are secured together and the wings held in folded and resilientcondition.

7. A guard for telephone monthpieces, comprising a plate having a lihii-eovered sound-receiving aperture, holding-wings on es of said plate being paralassess plate at points within the afford resilient mouthpiece-engaging chps. In testimo my hand in presence oftwo messes.

opposite sides of said aperture, and fastening means passin throughssid plate and wings; at points wit in their marginal edges to secure said wings and plst e tsgetlwr and form' 5 resilient mouthpiece-engaging e ips.

8. A guard for telephone-mouthpieces, comprising a plate hsving a film-covered s0und.receiving a erbure, infoided integral holding-Wings at t e'e'flgss'of said plate, a-qd' 10 means fer securing-said infoldedwings to send I GERH-ARDT 1E. GRI MQ Witnesses:

JAMES RLRUDOLPH ALEX WATER ir nmrginal edges 0(5- ny whereof I have hereunto set subscrlblng w1tv 

